moments of inertia - nasa · personal background moments of inertia, uav droid 3 of 18 csun applied...
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August 23, 2006
Moments of Inertia�
Uninhabited Aerial Vehicle (UAV) �Dryden Remotely Operated Integrated Drone (DROID) �
Presented by Helida C. Haro�August 5, 2010
https://ntrs.nasa.gov/search.jsp?R=20110008320 2019-12-30T06:59:59+00:00Z
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Agenda
Personal Background Research
Importance Measure, Weight, CG Design Hardware and Test Machining Hangar Safety Mitigations Critical Design Review (CDR) Tech Brief Test Analyze Data
Lessons Learned Future Plans Questions
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Personal Background
Moments of Inertia, UAV DROID 3 of 18
CSUN Applied Mathematics Master Student
CA Mathematics Council Member
CSUN Mathematics Club Member
National Science Foundation Scholarship Recipient
NASA Intern
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Research
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Mass Properties
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Themasspropertiesofanobjectaresimplytheproportionalityconstantsbetweenappliedforceandtheresultingacceleration:
ThisisNewton’s2ndlawfor1DegreeofFreedom(DOF)translationandrotation,respectively
Whenexpandedto6DOF:CGinformation
InertiaTensorMass
6DOFforce 6DOF
acceleration
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Importance
The inertial characteristics have direct consequences on:
Aerodynamics Propulsion Structures Control
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Measure and Weight
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Design
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Manufacturing
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Shuttle Hangar
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Safety
Human Hazard Analysis Loss of Asset/Mission Hazard Analysis
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Approvals
Critical Design Review (CDR) Tech Brief
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Testing
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Data Analysis
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Time Constraints Basic Geometric Shapes MATLAB Error
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Lessons Learned
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Dryden vs. Disneyland Learning Team Effort Double check all work Stress Testing Use steel instead of aluminum
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Future Plans
GSRP at NASA Headquarters Graduate Work for NASA
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Questions?
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Mark, Chris, Aaron, Lesli, Stephanie, Alex, and Helida All photos provided by: NASA photographer, Thomas P. Tschida and INSPIRE Team
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UAVSAR Longitudinal Center of Gravity and Yaw Inertia TRR & CLR 18 of 10
BACK-UP: Inertia Calculations
Where, I = Yaw Mass Moment of Inertia, [lb-in2] g = gravity, [in/sec2] d = Distance Between Cables, [in] l = Cable Length, [in] T = Period of Oscillation, [sec] W = Weight, [lb]
Reference: NACA TN No.351
Pod
l
Rig
d